OSID - osid.grading.GradeSystemGradebookAssignmentSession Service Interface Definition

Interface	osid.grading.GradeSystemGradebookAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign grade systems to `Gradebooks.` A `GradeSystem` may map to multiple `Gradebooks` and removing the last reference to a `GradeSystem` is the equivalent of deleting it. Each `Gradebook` may have its own authorizations governing who is allowed to operate on it. Moving or adding a reference of a `GradeSystem` to another `Gradebook` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignGradeSystem
Description	Tests if this user can alter grade system/gradebook mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer assignment operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignGradeSystemsToGradebook
Description	Tests if this user can alter grade system/gradebook mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer assignment operations to unauthorized users.
Parameters	`osid.id.Id`	`gradebookId`	the `Id` of the `Gradebook`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`gradebookId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableGradebookIds
Description	Gets a list of gradebooks including and under the given gradebook node in which any grade system can be assigned.
Parameters	`osid.id.Id`	`gradebookId`	the `Id` of the `Gradebook`
Return	`osid.id.IdList`		list of assignable gradebook `Ids`
Errors	NULL_ARGUMENT		`gradebookId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableGradebookIdsForGradeSystem
Description	Gets a list of gradebooks including and under the given gradebook node in which a specific grade system can be assigned.
Parameters	`osid.id.Id`	`gradebookId`	the `Id` of the `Gradebook`
Parameters	`osid.id.Id`	`gradeSystemId`	the `Id` of the `GradeSystem`
Return	`osid.id.IdList`		list of assignable gradebook `Ids`
Errors	NULL_ARGUMENT		`gradebookId` or `gradeSystemId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignGradeSystemToGradebook
Description	Adds an existing `GradeSystem` to a `Gradebook.`
Parameters	`osid.id.Id`	`gradeSystemId`	the `Id` of the `GradeSystem`
Parameters	`osid.id.Id`	`gradebookId`	the `Id` of the `Gradebook`
Errors	ALREADY_EXISTS		`gradeSystemId` is already assigned to `gradebookId`
	NOT_FOUND		`gradeSystemId` or `gradebookId` not found
	NULL_ARGUMENT		`gradeSystemId` or `gradebookId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignGradeSystemFromGradebook
Description	Removes a `GradeSystem` from a `Gradebook.`
Parameters	`osid.id.Id`	`gradeSystemId`	the `Id` of the `GradeSystem`
Parameters	`osid.id.Id`	`gradebookId`	the `Id` of the `Gradebook`
Errors	NOT_FOUND		`gradeSystemId` or `gradebookId` not found or `gradeSystemId` not assigned to `gradebookId`
	NULL_ARGUMENT		`gradeSystemId` or `gradebookId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.